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Phone Directory 312-345 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 345-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-345 Chicago, IL Ameritech Illinois Cook Landline 11/11/2003

Other Series For Prefixes

312-3450###
312-3451###
312-3452###
312-3453###
312-3454###
312-3455###
312-3456###
312-3457###
312-3458###
312-3459###